Spinning-box mounting



H. CREWDSON. SP G BOX MOUNT APPL N FILED DEC|9|1 1,381,805. Patented June 14, 1921.

UNITED STATES PATENT ori-"ica HENRY CREWDSON, OF ROANOKE, VIRGINIA. ASSIGNOR OF ONE-HALF T0 COUR- TAULDS, LIMITED, OF LONDON. ENGLAND, .AND ONE-HALF TO THE VISCOSE COMPANY, OF BOANOKE, VIRGINIA.

SPINNING-BOX MOUNTING.

Specification of Letters Patent.

Patented June 111, 1921.

Application filed December 9, 1919. Serial No. 343,640.

To all 'whom it may concern:

Be it-known that I, HENRY CRrwDsoN, a subject of the King of Great Britain and Ireland, residing at 101 Arbutus avenue. in the city of Roanoke, county of Roanoke. and State of Virginia, have invented certain new and useful Improvements in Spinning-Box Mount-ings, of which the following is a specication.

My invention relates to spinning box mountings, and particularly to the connec- -tion between the spinning spindle and spinmushroom;

Fig. 3 is a section on the line 3-3 Fig. 2; and

Fig. 4 is a vertical section through the bushing of a spinning box. l

It is now customary to lmount the hard rubber spinning box 5 on the spinning spindle 6 by a friction fit. This results in excessive wear between the parts due t-o slippage, causes objectionable speed variation in the drive of the box, during the spinning operation, and increases upkeep and maintenance costs.- By the present invention I provide a positive drive connection between the parts. which obviates these troubles.

The hub 7 of the box has molded therein a bushing 8, in the inner face of which are cut wide spiral channels 9 of very steep pitch. At the lower end of the bushing these channels are flared to afford wide mouths 10. On the tapered end 11 of the spindle 6 is driven the sleeve 12 with its mushroom iange 10, on which the hub of the spinning box is supported in driving position. the outer face of the mushroom sleeve are formed spiral ribs 14 of similar steep pitch, the upper ends of which are beveled at 15 the depth of the sleeve. Obviously, the engagement between the spiral ribs and the grooves is facilitated by beveling the entering ends of the ribs to a point and expanding the mouths of the spiral channels. Of course. when the box is seated against the mushroom fiange 13 it is positively held b v the ribs and grooves against slippage, and the usual wear between the parts and the variations in drive speed are therebiY eliminated. It will be noted also that the threads are cut in a direction such that on rotation of the spindle during the drive. the box is held positively down upon the mushroom in fixed position.

Various modifications will readily occur to those skilled in the art. which do not depart from what I claim as my invention.

-I claim- 1. A spindle. a mushroom thereon. a spinning box freely resting on said mushroom.

and a steep pitch screw connection between said mushroom and spinning box to prevent slippage on the drive of the spindle.

2. A spindle. a mushroom thereon. a spinning box freely resting on said mushroom, and a steep pitch screw connection between said mushroom and spinning box to prevent slippage on the drive of the spindle. the threads being cut in a direction such that on the rotation of the spindle the drive of the latter tends to hold the box in fixed position on the mushroom.

3. A spindle. a mushroom thereon. a spinning box freely resting on said mushroom. a steep pitch screw connection between the box and mushroom sleeve. the threads of the screw being wide. but beveled at their entering ends to facilitate engagement with the cooperating tap channels.

1. A spindle. a mushroom thereon, a spinning box freely resting on said mushroom. a steep pitch screw connection between the box menace and mushroom sleeve, the mouths olf' the tap channels being flared to facilitate the entry of the threads therein.

5. A spindle, a mushroom thereon, a spinning box freely resting on said mushroom, a steep pitch screw connection between the box and mushroom sleeve, the threads of the screw being wide, but beveled at their enter'n ing ends to facilitate engagement with the cooperating tap channels, and the mouths of l@ the tap channels being flared to permit the ready entry of the screw threads.

In testimony whereof I have signed my name to this specification.

HENRY CREWDSGN. 

